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Polio this week

Photo review of recent WHA

Click here for a photo essay of last month’s World Health Assembly (WHA), where Member States reaffirmed their commitment to ending polio. 
In a time marked by conflict, competing priorities and pressure on global health systems, this shared commitment sends a powerful message: protecting children from polio remains a global priority.  With sustained political and financial commitments and the dedication of health workers on the frontline, a polio-free world is within reach.

Summary of new polioviruses this week: 

  • Pakistan:  four WPV1-positive environmental samples
  • Central African Republic (CAR):  two cVDPV2 cases
  • Malawi:  one cVDPV2 case and two cVDPV2-positive environmental samples
  • Nigeria:  one cVDPV2 case
Country updates as of 2 June 2026

More information on the countries that have reported cases and/or environmental samples this week.

  • No WPV1 cases were reported this week (most recent case:  7 April 2026).  The total number of cases in 2025 is 31. The total number of cases in 2026 is three.
  • Four WPV1-positive environmental samples were reported this week, from Sindh, collected in early May 2026 (most recent positive environmental sample:  5 May 2026).

  • Two cVDPV2 cases were reported this week, from RS1, with onsets of paralysis on 20 April 2026 and 24 April 2026 (most recent case).  These are the first cases reported in 2026.  There are two cases reported in 2025.

  • One cVDPV2 case was reported this week, from Southern province, with onset of paralysis on 22 December 2025 (most recent case).  There is one case reported in 2025.
  • Two cVDPV2-positive environmental samples were reported this week, from Southern province, collected on 23 March 2026 and 20 April 2026 (most recent positive environmental sample.  

  • One cVDPV2 case was reported this week, from Kaduna, with onset of paralysis on 2 May 2026 (most recent case).  The total number of cVDPV2 cases reported in 2025 is 66.  The total number of cVDPV2 cases reported in 2026 is 25.
  • No cVDPV2-positive environmental sample was reported this week (most recent positive environmental sample:  6 April 2026).
  • No cVDPV3 cases were reported this week.  The total number of cVDPV3 cases in 2025 is seven.  The total number of cVDPV3 cases in 2026 is six (most recent case:  25 April 2026).